Congress President and UPA Chairperson Sonia Gandhi is addressing the function to celebrate the 150th birth anniversary of Swami Vivekananda in New Delhi. Prime Minister Manmohan Singh was the chief guest at the closing ceremony of the celebrations on Sunday. Apart from Congress president Sonia Gandhi, Defence Minister A.K. Antony was also present on the occasion at Vigyan Bhawan. A national committee under the chairmanship of the prime minister was formed in 2010 to celebrate the 150th birth anniversary of Swami Vivekananda.